On 4/22/14, 1:43 AM, Christoph Hellwig wrote:
> On Mon, Apr 21, 2014 at 03:33:37PM -0500, Eric Sandeen wrote:
>> The Q_XQUOTARM quotactl was not working properly, because
>> we weren't passing around proper flags. The xfs_fs_set_xstate()
>> ioctl handler used the same flags for Q_XQUOTAON/OFF as
>> well as for Q_XQUOTARM, but Q_XQUOTAON/OFF look for
>> XFS_UQUOTA_ACCT, XFS_UQUOTA_ENFD, XFS_GQUOTA_ACCT etc,
>> i.e. quota type + state, while Q_XQUOTARM looks only for
>> the type of quota, i.e. XFS_DQ_USER, XFS_DQ_GROUP etc.
>> Unfortunately these flag spaces overlap a bit, so we
>> got semi-random results for Q_XQUOTARM; i.e. the value
>> for XFS_DQ_USER == XFS_UQUOTA_ACCT, etc. yeargh.
>> Split out the flag conversion from userspace to kernelspace,
>> depending on the quotactl that is being executed; add 2 new
>> helpers to do this, so that we send the right flags to the
>> lower-level functions.
>> This has been broken more or less forever, AFAICT.
> So if this isn't very urgent I'd rather replace ->set_xstate with one
> operation per ioctl, so that we don't multiple different kinds of flags
> over the same operation.
eh, that's probably better, I'll take a look.